A method for controlling the field focusing of a tower solar heliostat

Abstract

The invention relates to a method for controlling field focusing of a tower-type solar heliostat, and belongs to the technical field of solar thermal power generation applications. At present, there is no method for controlling the field focusing of tower solar heliostats with simple process and uniform distribution of light spots on the receiver. The feature of the present invention is: the steps of the control method are as follows: the receiver is divided into blocks, and the divided blocks correspond to the areas of the heliostat field one by one, and the heliostats in the area are respectively focused on the designated blocks, Make the light spots of each area in the heliostat field focus on the corresponding block on the receiver to disperse the energy reflected by the heliostat field, and dynamically adjust the distribution of the light spot in an orderly manner, thereby controlling each block on the receiver Concentration ratio, so that the temperature of the receiver is uniform. The technology of the invention is simple, the light spots on the receiver are evenly distributed, the impact of high light concentration ratio on the receiver can be reduced, and the reliability of the system and the service life of the receiver can be improved.

Description

technical field [0001] The invention relates to a method for controlling the field focus of a tower-type solar heliostat, which belongs to the technical field of solar thermal power generation applications, and is specifically used for controlling the focus control of a tower-type solar energy system. Background technique [0002] Solar thermal power generation refers to the use of large-scale arrays of parabolic or dish mirrors to collect solar heat energy, take it away through heat transfer media, and generate steam from heat exchange devices, combined with traditional turbogenerator technology, so as to achieve the purpose of power generation. Tower solar power generation is an important mode of solar thermal power generation, and it is also one of the modes with the most promising prospects for large-scale commercial application. It is equipped with many large-scale solar reflectors on a large area, usually called heliostats, each equipped with a tracking mechanism to ac...

AI Technical Summary

Problems solved by technology

[0005] There are also some relatively good tower-type solar mirror field focusing methods. For example, in a Chinese patent with a publication date of March 11, 2015 and a publication number of CN104408527A, a focusing strategy optimization of a tower-type solar thermoelectric system mirror field is disclosed. method, although the focusing strategy optimization method of the mirror field of the tower solar thermoelectric system can make the energy distribution on the heating surface of the heat absorber uniform under the premise of ensuring that the heat absorber receives as much energy as possible, which is beneficial to protect the heat absorber device, improve heat exchange efficiency, and enhance system performance, but the whole method is cumbersome and inconvenient to operate

[0006] To sum up, at present, there is no field focus control of tower solar heliostats that has a simple process, uniform distribution of light spots on the receiver, can reduce the impact of high concentration ratio on the receiver, and improve system reliability and receiver service life. method

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